<template>
    <div class="header">
        <!-- 折叠按钮 -->
        <div class="header_content">
            <div class="collapse-btn" @click="collapseChage">
                <i v-if="!collapse" class="el-icon-s-fold"></i>
                <i v-else class="el-icon-s-unfold"></i>
            </div>
            <div class="logo">智能化管理平台</div>
        </div>
        <div class="header-right">
            <div class="header-user-con">
                <!-- 全屏显示 -->
                <div class="btn-fullscreen" @click="handleFullScreen">
                    <el-tooltip effect="dark" :content="fullscreen?`取消全屏`:`全屏`" placement="bottom">
                        <i class="el-icon-rank"></i>
                    </el-tooltip>
                </div>
                <!-- 用户头像 -->
                <div class="user-avator">
                    <img src="../assets/imgae/timg.png" />
                </div>
                <!-- 用户名下拉菜单 -->
                <el-dropdown class="user-name" trigger="click" @command="handleCommand">
                    <span>{{username}}<i class="el-icon-caret-bottom"></i></span>
                    <el-dropdown-menu slot="dropdown">
                        <el-dropdown-item divided command="loginout">退出登录</el-dropdown-item>
                    </el-dropdown-menu>
                </el-dropdown>
            </div>
        </div>
    </div>
</template>
<script>
    import bus from '../common/bus';
    export default {
        data() {
            return {
                collapse: false,
                fullscreen: false,
                name: undefined,
                message: 2
            };
        },
        computed: {
            username() {
                let username = JSON.parse(sessionStorage.getItem('information')) || null;
                return username ? username.role : this.name;
            }
        },
        methods: {
            // 用户名下拉菜单选择事件
            handleCommand(command) {
                if (command == 'loginout') {
                    sessionStorage.removeItem('information');
                    this.$router.replace('/login');//跳转到首页
                }
            },
            // 侧边栏折叠
            collapseChage() {
                this.collapse = !this.collapse;
                bus.$emit('collapse', this.collapse);
            },
            // 全屏事件
            handleFullScreen() {
                let element = document.documentElement;
                if (this.fullscreen) {
                    if (document.exitFullscreen) {
                        document.exitFullscreen();
                    } else if (document.webkitCancelFullScreen) {
                        document.webkitCancelFullScreen();
                    } else if (document.mozCancelFullScreen) {
                        document.mozCancelFullScreen();
                    } else if (document.msExitFullscreen) {
                        document.msExitFullscreen();
                    }
                } else {
                    if (element.requestFullscreen) {
                        element.requestFullscreen();
                    } else if (element.webkitRequestFullScreen) {
                        element.webkitRequestFullScreen();
                    } else if (element.mozRequestFullScreen) {
                        element.mozRequestFullScreen();
                    } else if (element.msRequestFullscreen) {
                        // IE11
                        element.msRequestFullscreen();
                    }
                }
                this.fullscreen = !this.fullscreen;
            }
        },
        mounted() {
            if (document.body.clientWidth < 1500) {
                this.collapseChage();
            }
        }
    };
</script>
<style lang="scss" scoped>
    .header {
        box-sizing: border-box;
        width: 100%;
        height: 70px;
        font-size: 22px;
        color: #fff;
        background: #0e528a;
        display: flex;
        justify-content: space-between;
        align-items: center;
        .header_content {
            width: 250px;
            height: 100%;
            display: flex;
            justify-content: space-around;
            align-items: center;
            .collapse-btn {
                padding: 0 21px;
                cursor: pointer;
                line-height: 70px;
            }
            .logo {
                text-align: center;
                line-height: 70px;
            }
        }
        .header-right {
            flex: 1;
            padding-right: 50px;
            display: flex;
            justify-content: flex-end;
            .header-user-con {
                display: flex;
                justify-content: space-around;
                height: 70px;
                width: 250px;
                align-items: center;
                .btn-fullscreen {
                    transform: rotate(45deg);
                    font-size: 24px;
                    border-radius: 15px;
                    cursor: pointer;
                    width: 30px;
                    height: 30px;
                    text-align: center;
                }
                .user-avator {
                    width: 50px;
                    height: 50px;
                    img {
                        width: 100%;
                        height: 100%;
                        border-radius: 50%;
                        background-size: cover;
                    }
                }
                .user-name {
                    color: #fff;
                    cursor: pointer;
                }
            }
        }
    }
</style>
